Clamping device



at, 8, 1935. J. s. TOWNSEND 2,

CLAMPING DEVICE Filed June 28, 1954 a INVENTOR. 34 I ,37 Jbfirz 5.70Z1/72&e72d

ix 't 30 BY J%M%WZI% ATTORNEY.

Patented Oct. 8, 1935 Z,016,94'T

UNITED STATES PATENT OFFICE CLAMPING DEVICE John S. Townsend, Chicago,Ill., assignor to Wilson & Bennett Mfg. 00., Chicago, 111., acorporation of Illinois Application June 28, 1934, Serial No. 732,800

4 Claims. (01. 254-77) This invention relates to clamps or fasteninghaving a flange Ill which projects outwardly over rings for containersand particularly to those the bead 8. A gasket M is usually interposedbe; known as full removable head barrels and to tween the parts 8 andIt] to make a tight closure, means for closing and fastening the ringspreparathis gasket also serving to provide a certain tory to applyingthe regular or permanent fasamount of yield or resiliency in the closingopera- 5 tening devices. tion. The clamp or ring I2 is approximatelyVarious types of clamps or clamping rings semi-circular in cross sectionor shaped so that have been proposed and used for clamping the when itis drawn tightly around the head of they covers on pails, barrels ordrums. Some of these barrel, the flange It and bead 8 will be drawnrings are provided with lever actuated means for toward each other andwill compress the gasket 10 drawing the ends of the ring into clampingposi- H. The ring is of the contractible or split type tion andfastening the same, and others are proand I provide lugs or brackets l3and I4 adjacent vided with screws or bolts for such purposes. to theends. These brackets may be formed in- While the lever actuated meansare usually quick tegrally with the ring or may be applied thereto toapply they are more or less expensive and liable preferably by beingweldedto the upper edge of 15 to become injured or get out of order.While the ring. In the form shown the brackets are bolts provide simplemeans for drawing the ends made of sheet metal and have flat ledges orplate together, comparatively long bolts are necessary portions l5 andI6 lying in the same plane as the in order to take up the spring orslack in the upper edge of the ring, these ledges having holes rings,such bolts therefore are difiicult to apply El and It for receiving thetightening or clampand considerable time is necessary to screw the ingtool. The brackets also have downwardly and same to closing position.inwardly extending projections I9 and 28 with In accordance with thepresent invention I holes for the fastening bolt or screw 2!. Theseprovide a novel clamp or clamping ring with auxbolts are preferably ofthe filister head type and.

iliary means for drawing the ends together and have nuts 22 which engagewith the sides or lower 25 holding the same while the bolt or fasteningportions of the bracket in order to prevent turnmember is applied. ing.

The objects of this invention other than as It will be understood thatthese rings or clampabove indicated are to provide an improved clamp ingmembers are comparatively stiff and when for fastening covers on barrelsor containers and they are sprung over the tops of the barrels the 30 toprovide a novel tool or clamping device for ends are separated for asubstantial distance, for drawing the ends of such clamp togetherpreinstance, as indicated by the dotted lines in Figparatory to placingthe fastening member in posiure 1. In order to draw the ends together totion. Other objects and advantages will appear clamp the rings tightlyin position, I provide a from the following description taken inconnectool or tightener such as indicated generally by 35 tion with theaccompanying drawing, in which, the numeral 23. This tool comprises alever 24 Figure l is a plan view showing a portion of having a handleportion 25 at one end and being a barrel with the clamping ring appliedthereto bent as shown at 26 adjacent to the opposite end. and alsoshowing the ends of the clamping ring A lever 2! is pivoted at 28 to thelever 24. Pins in dotted lines in the position which they may or lugs 29and 383 are provided at the adjacent assume prior to being drawntogether; ends of the levers 24 and 27 for engagement with Figure 2 is asectional view taken on the line the holes ll and E8 in the ringbrackets. These z..: of Figure 1; pins are preferably arranged at anangle or con- Figure 3 is a plan view of the clamping device verging asindicated in Figure 6, to insure posior detachable ring contractingmechanism shown tive holding in the brackets. A link 3| is pivoted inclosed position; to the lever 24 at 32 and its other end is pivotedFigure 4 is a similar View showing the tool or at 33 to one end of abell crank or bent lever 34, ring tightener in open position; the longbranch of which provides a handle por- Figure 5 is a side view; and tion35. The lever 34 is pivoted at the bend to Figure 6 is a sectionaldetail taken on the line the end of the lever 21 as shown at 3B. 50

6-6 of Figure 3. In the operation of the device, the handles 25 Thebarrel 1 shown in the drawing is illustraand 35 are spread apart asshown in Figure 4 and tive of the type for which my improved clampingthe pins 29 and 30 are inserted in the holes I! and device is intended.'The barrel has a bead or 18 in the ring brackets. The handles are thenflange 8 at the top and is provided with a cover 9 pressed toward eachother, or one handle is held 55 stationary and the other moved so as toswing the pins 29 and 30 toward each other or to the position shown inFigure 3. This will draw the ends of the ring closely together orpreferably into final closing and clamping position. It will be notedthat the link 3| and the short end of the lever 34 act as a toggle sothat extreme force may be applied at the ends 'of the closing movement.In order to hold the tightener in closed position the pivot 36preferably is arranged to pass the dead center between the pivots 32 and33 and a pin or lug 37 is arranged on the lever 34 to prevent thefurther movement of these parts. After the operator has moved thehandles toward each other to close the ring and to lock the clampingdevice it will hold the ends of the ring while he inserts the fasteningbolt 3| and screws the bolt to holding position. It will be seen that bymeans of this arrangement a comparatively short bolt may be used and thebolt may be quickly tightened as it is not necessary to utilize the samefor drawing the ends of the ring together. As soon as the bolt is placedin position the handles 25 and 35 are separated sufficiently to releasethe catch pins 29 and 30 and the device may then be removed.

From this description it will be seen that I provide a simple andinexpensive clamp or clamping ring for the purposes indicated andfurthermore by means of my improved clamping device or tool these ringsmay be quickly and effectively applied inasmuch as comparatively lightforce is necessary to draw the ring to closing position, due to theunique arrangement of the levers of the clamping tool.

Any improvements shown and described herein but not claimed are notintended to be abandoned or dedicated to the public, some of suchimprovements being shown and claimed in my co-pending application forClosures for barrels, Serial No. 746,653.

While I have illustrated a preferred form of my invention it will beunderstood that the same may be modified without departing from thescope thereof as set forth in the following claims, in which I claim:

1. A clamping tool for the purposes set forth, comprising a pair oflevers which are pivoted together, pins at the ends of said levers forengagement with the parts to be drawn together, and toggle levermechanism coacting with the first named levers for drawing the free endstogether.

2. A ring tightener comprising a bent lever having a pin at one end anda handle portion at the opposite end, a second lever 'pivoted to thefirst named lever adjacent to the bend and having a pin at the free endthereof, a link having one end pivoted to the first named lever at apoint between said pivot and the handle, a second bent lever pivotallyconnected to the second lever and having one end pivoted to the link andthe other end extended to provide a handle portion.

3. A tool of the character set forth, comprising a lever having anobliquely arranged pin at one end and a handle at the opposite end, asecond lever pivoted to the first named lever and having an obliquelyarranged pin at the free end thereof, a link having one end pivoted tothe first named lever, a third lever having oneend pivoted to the freeend of the link and pivotally connected to the end of the second namedlever and having a handle portion, said link and coacting levers forminga toggle, and a stop for limiting the movement of the toggle membersafter they have passed slightly beyond dead center.

4. A tool for drawing the ends of a clamping ring together and holdingthem in clamping position, comprising a plurality of coacting leverswith means for engagement with the ends of the ring, said leversincluding toggle portions which move beyond dead center when the ends ofthe ring are drawn to closing position and means associated with saidlevers for preventing further movement of the toggle portion, thearrangement being such that the tool will hold the ends of the ring inclosed position when the toggle has passed slightly beyond dead center.

JOHN S. TOWNSEND.

